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:
1.Global Initiative for Chronic Obstructive Lung Disease. National Heart, Lung, and Blood Institute. Publication Number 2701. March 2001; 100 p.
2.Barnes PJ. Chronic obstructive pulmonary disease. N Engl J Med 2000; 343:269.
3.Barnes PJ. Bronchodilators: basic pharmacology. In Calverley P, Pride N, eds. Chronic obstructive pulmonary disease. London: Chapman and Hall, 1995; 391417
4.Snow V, Lascher S, Mottur-Pilson C. Ann Intern Med 2001; 134: 5959
5.Postma DS, Kerstjens HAM. Am J Respir Crit Care Med 1999;160:S66S71.
6.TRISTAN COPD study. TRISTAN COPD Newsletter; 09.10.2001; p. 121.